XML > 4000 chars published through SimpleURLRegistry gets StackOverflow
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Key: SYNAPSE-440
URL: https://issues.apache.org/jira/browse/SYNAPSE-440
Project: Synapse
Issue Type: Bug
Components: Core
Affects Versions: 1.2
Environment: WinXP, Java6, Standard Synapse 1.2 binary
Reporter: Jason Royals
Consider the following config:
{code}
<definitions xmlns="http://ws.apache.org/ns/synapse";>
<registry provider="org.apache.synapse.registry.url.SimpleURLRegistry">
<parameter name="root">file:./repository/conf/registry/</parameter>
<parameter name="cachableDuration">5000</parameter>
</registry>
<proxy name="MyService" transports="http">
<description>A cool service.</description>
<target inSequence="mediators/insequence.xml"
outSequence="mediators/outsequence.xml"
faultSequence="mediators/faultsequence.xml"
endpoint="mediators/endpoint.xml"/>
<publishWSDL key="public-api/service.wsdl"/>
</proxy>
</definitions>
{code}
If "service.wsdl" is quite small, this config works perfectly.
Now add to the wsdl some comments, or a new type, or anything such that the
size of the schema is now > 4000 characters. Start Synapse and this is what
you'll get:
{code}
2008-09-09 [main] FATAL ServerManager Synaps startup failed...
java.lang.StackOverflowError
at
org.apache.axiom.om.impl.llom.OMNodeImpl.setComplete(OMNodeImpl.java:181)
at
org.apache.axiom.om.impl.llom.OMNodeImpl.setComplete(OMNodeImpl.java:181)
at
org.apache.axiom.om.impl.llom.OMNodeImpl.setComplete(OMNodeImpl.java:181)
at
org.apache.axiom.om.impl.llom.OMNodeImpl.setComplete(OMNodeImpl.java:181)
... and on it goes
{code}
I have a JUnit test which exposes the problem, and sequence of operations to
make it fail in this way, and will attach to the issue.
Regarding the cause, I did get down and dirty with Axiom and Woodstox and I'm
still not sure if its the way ProxyService uses Axiom, or if it is how Axiom
uses Woodstox (which has a 4000 character stream buffer - no coincidence I'm
sure). I do know that when the 4000 (or thereabouts) character limit is
reached, Woodstox seems to start from the top of the WSDL again and Axiom
processes it all again, and again, and again. Woodstox doesn't appear to get
the next "page" of 4000 characters (or maybe it is not being given he
opportunity) and repeats what it just did again, and so on. It _only_ happens
through the SimpleURLRegistry so far as I can tell, by _not_ using the
SimpleURLRegistry everything seems OK.
Workaround for this is to replace "key" with "uri" in the {{publishWSDL}}
element and point directly to the wsdl. It seems that if we don't go through
SimpleURLRegistry, everything works fine.
Cheers,
Jason
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